Used a Water Taxi in June/July 2014 between St. Thomas and Nanny Cay, non-stop, direct organized by my son for 5. Don't know the name, it was a sweet way to travel but it was over $600. We needed to use one to get everyone together in St. Thomas and make the trip, which, due to one of my daughter's late arrival, was well after 5p.

There are plenty or reliable water taxis. Whether this is a good idea or not depends on a lot of factors. If your transporting a large group (6 or more) it works a lot better than say just two couples. It's a nice way to start as the Captain does all the work (Customs et. al.), you sit back and chill with a cold beer. My kids loved it. Captain pulled right up to the stern of our charter on the dock and unloaded everyone's bags into the cockpit. He got a nice tip.